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PAF-acether in AK-5 tumour cells.
G K Marathe1, T P Krishnakantha, C J D'Souza
1Department of Studies in Biochemistry, University of Mysore, India.
Cell Biology International Reports
|January 1, 1991
Summary
Tumor cells produce platelet-activating factor-acether (PAF-acether), a substance typically associated with inflammation. This finding suggests a broader role for PAF-acether beyond pro-inflammatory responses, potentially impacting tumor biology.
Area of Science:
- Biochemistry
- Immunology
- Oncology
Background:
- Platelet-activating factor-acether (PAF-acether) is a potent lipid mediator primarily known for its role in inflammatory processes.
- Its production is generally attributed to pro-inflammatory cells.
Purpose of the Study:
- To investigate the production of PAF-acether in tumor cells.
- To characterize the properties of PAF-acether derived from tumor cells.
Main Methods:
- AK-5 tumor cells were stimulated with calcium ionophore A23187.
- The platelet aggregating ability of the derived fraction was measured.
- Biological and chemical properties of the fraction were compared to authentic PAF-acether.
Main Results:
- PAF-acether was successfully derived from stimulated AK-5 tumor cells.
- Platelet aggregation increased linearly with calcium ionophore concentration, peaking at 6 microM within 25 minutes.
- The derived PAF-acether exhibited identical biological and chemical properties to authentic PAF-acether.
Conclusions:
- Tumor cells, specifically AK-5 cells, are capable of producing PAF-acether.
- This finding expands the known cellular sources of PAF-acether beyond traditional pro-inflammatory cells.
- The production of PAF-acether by tumor cells may have implications for understanding tumor-associated inflammation and platelet interactions in cancer.